I 



Halsted : Mycological Notes 13 



^pito. 



Rtist of PJiIox subidata, — Plilox subidata\^. grows quite abund- 

 antly upon the red shale cliffs in the vicinity of New Bruns- 

 wick. As its name suggests it is a prostrate plant sending up 

 short flower stalks in very early spring. By the first of June it is 

 like a mat of moss upon the exposed places where it grows. ' 



Attention was attracted to this plant upon a recent botanical 

 excursion by the more upright habit of some of the specimens. 

 A closer examination revealed the fact that they Avere attacked by 

 a rust. In passing it may be stated that low creeping plants are 

 quite apt to have the stems more upright when infested by a rust. 



The rust in question is quite different microscopically from 

 Pticcinia plumb aria Pk., that is found upon Phlox divaricata L., P. 

 longifolia Nutt. and P, Douglasii Hook., but agrees closely with 

 Piiccinia GUeae Ell. & Hark., as found upon GUia divaricata 

 Torr., G. sqtiarrosa H. & A. and G. intertcxta Steud. 



Dr. Kelsey has distributed it upon Phlox RicJiardsonii Hook, 

 from Helena, Montana, and is given upon P. cat 

 condensata Gr, in Farlow's Host Index. 



So far as is learned from the locality of the hosts and the speci- 

 mens of the species in the herbarium,' namely : From California, 

 collected by Dr. Harkness, the author of the species, upon Gilia 

 divaricata Torr., two specimens from Moses Craig, Corvallis, 

 Oregon, one upon Gilia squarrosa H. & A., and the other upon 

 G, intertexta Stend., and the specimens from Dr. Kclsey, collected 

 at Helena, Montana, upon Phlox Richardsonii Hook., it would 

 seem that the species of rust is particularly a far western one, and 

 the present find extends its range to the Atlantic coast. 



The so-to-speak eastern rust of the Phlox, Puccinia phimbaria 

 described by Peck in volume six of the Botanical Gazette and 

 mentioned for Ilhnois by Dr. Burreell, also reaches across the con- 

 tinent, for Dr. Harkness collected it in California upon Phlox 

 Douglasii Hark. Thus the two species are widespread in the 

 United States and probably not as yet found elsewhere. 



Sun-exposed Leaves and Blight, — That the leaf blight {Cylin- 

 drosporium padi Karst.), is often more abundant upon one half of 

 the cherry leaf than the other, has been a matter of observation for 

 years and the cause of the peculiarity was not determined in the 

 writer's case at least, until recently, when after an inspection of fifty 



